Patent US4180393A successfully refreshed from Google Patents.
Patent US3929427A successfully refreshed from Google Patents.
US3929427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant surface composite materials and method for producing same
Assignee: Praxair ST Technology Inc
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Filing: 1973-05-04
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Granted: 1975-12-30
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Expires: 1993-05-04
Abstract
Abstract Materials, such as metals, alloys and other products are provided with improved wear-resistant surfaces comprised of a hard monocarbide phase in the form of filaments within the material matrix.
Inventors
- 👤 Peshotan S Kotval
- 👤 Henri Hatwell
- 👤 Frank P Gortsema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:54
CPC Classifications
C; C22; C22C; C22C49/00; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/31504; Y10T428/31678; Y10T442/00; Y10T442/20; Y10T442/273
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
AN IMPROVED WEAR-RESISTANT SURFACE COMPOSITE MATERIAL, THE SURFACE OF WHICH HAS A DUPLEX COMPOSITE STRUCTURE COMPRISED OF (A) A MATRIX MATERIAL OF POOR WEAR-RESISTANCE AND (B) NOT LESS THAN ABOUT 50 PERCENT AREA FRACTION AND UP TO ABOUT 90 PERCENT AREA FRACTION OF A HARD FIBROUS MONOCARBIDE PHASE. SAID MONOCARBIDE PHASE BEING REPRESENTED BY THE GENERAL FORMULA MC WHEREIN M IS A METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, TITANIUM OR TUNGSTEN AND C IS CARBON, SAID MONOCARBIDE PHASE BEING IN THE FORM OF FILAMENTS BETWEEN 2 AND ABOUT 15 MICRONS IN DIAMETER AND BEING PRESENT AT THE COMPOSITE SURFACE AS SECTIONS OF VARYING ORIENTATIONS, THE REMAINDER OF THE SURFACE BEING COMPOSED OF THE MATRIX OF THE SAID MATERIAL.
Claim 2
Dependent Claim
120 words
AN IMPROVED WEAR-RESISTANT SURFACE COMPOSITE MATERIAL, THE SURFACE OF WHICH HAS A DUPLEX COMPOSITE STRUCTURE COMPRISED OF (A) A MATRIX MATERIAL OF POOR WEAR-RESISTANCE AND (B) NOT LESS THAN ABOUT 50 PERCENT AREA FRACTION AND UP TO ABOUT 90 PERCENT AREA FRACTION OF A HARD FIBROUS MONOCARBIDE PHASE. SAID MONOCARBIDE PHASE BEING REPRESENTED BY THE GENERAL FORMULA MC WHEREIN M IS A METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, TITANIUM OR TUNGSTEN AND C IS CARBON, SAID MONOCARBIDE PHASE BEING IN THE FORM OF FILAMENTS BETWEEN 2 AND ABOUT 15 MICRONS IN DIAMETER AND BEING PRESENT AT THE COMPOSITE SURFACE AS SECTIONS OF VARYING ORIENTATIONS, THE REMAINDER OF THE SURFACE BEING COMPOSED OF THE MATRIX OF THE SAID MATERIAL.
Claim 3
Dependent Claim
11 words
The composite of claim 1 wherein said matrix material is aluminum.
Claim 4
Dependent Claim
14 words
The composite material of claim 1 wherein said matrix material is an aluminum alloy.
Claim 5
Dependent Claim
18 words
The composite material of claim 1 wherein said matrix material is a casting grade aluminum-silicon hypereutectic alloy composition.
Claim 6
Dependent Claim
14 words
The composite material of claim 1 wherein M of said general formula is tantalum.
Claim 7
Dependent Claim
14 words
The composite material of claim 1 wherein M of said general formula is titanium.
Claim 8
Dependent Claim
14 words
The composite material of claim 1 wherein M of said general formula is tungsten.
Claim 9
Dependent Claim
15 words
The composite material of claim 1 wherein said filaments are present as a woven fabric.
Claim 10
Dependent Claim
14 words
The composite material of claim 1 wherein said filaments are present as a felt.
Claim 11
Dependent Claim
14 words
The composite material of claim 1 wherein said filaments are present as chopped fibers.
Claim 12
Dependent Claim
15 words
The composite material of claim 9 wherein said woven fabric is present as a tape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |